With char becoming unsigned by default, and with `char` alone being ambiguous and based on architecture, signed chars need to be marked explicitly as such. In this case, passing `char *extra` is part of the iw API, and that extra is mostly intended to be somewhat opaque. So just cast to `s8 *` for the sign test. This fixes warnings like: drivers/staging/rtl8192e/rtllib_softmac_wx.c:459 rtllib_wx_set_essid() warn: impossible condition '(extra[i] < 0) => (0-255 < 0)' Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: linux-staging@xxxxxxxxxxxxxxx Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx> --- drivers/staging/rtl8192e/rtllib_softmac_wx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/rtl8192e/rtllib_softmac_wx.c b/drivers/staging/rtl8192e/rtllib_softmac_wx.c index f9589c5b62ba..4563e3b5bd47 100644 --- a/drivers/staging/rtl8192e/rtllib_softmac_wx.c +++ b/drivers/staging/rtl8192e/rtllib_softmac_wx.c @@ -456,7 +456,7 @@ int rtllib_wx_set_essid(struct rtllib_device *ieee, } for (i = 0; i < len; i++) { - if (extra[i] < 0) { + if (((s8 *)extra)[i] < 0) { ret = -1; goto out; } -- 2.38.1